Particularly controversial are the biophysical mechanisms by which these RF fields may affect biological systems. General health effects reviews explore possible carcinogenic, reproductive and neurological effects.
Well, yes, vaseline can do a help to the black eye. As we know that black eye is due to a bruise or contusion, which is an injury to the tissue under the skin cause by a blow from an object. So eye injury, head injury can lead to it. According to some experts, by using it, it will help the pain and swelling go down.
Cold sore unrelated: I don't think that cold sore outbreak was directly related to the use of vaseline. Petroleum jelly (vaseline) actually is known to promote healing of damaged skin, since it helps 'seal in' the sensitive skin cells under the damaged area...then they can regenerate. Cold sores usually come out at times of stress- exams, break-ups etc, so I think this was unrelated. Best to keep stress to a minimum.